CVE-2023-6164: The MainWP Dashboard – WordPress Manager for Multiple Websites Maintenance plugin for WordPress is vulnerable

Q: How do I fix CVE-2023-6164?

mainwp: upgrade to newer than 4.5.1.2. Exact commands for each OS are on this page.

Q: Is CVE-2023-6164 being exploited?

CVE-2023-6164 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-6164 affect?

CVE-2023-6164 affects mainwp. Severity is low (CVSS 2.2). The MainWP Dashboard – WordPress Manager for Multiple Websites Maintenance plugin for WordPress is vulnerable to CSS Injection via the ‘newColor’ parameter in all versions up to, and including, 4.5.1.2 due to insufficient input sanitizatio

Q: How urgent is CVE-2023-6164?

Priority 16/100. No elevated risk signals yet.

Routine

LOW 2.2UPGRADE

CVE-2023-6164 is a low-severity flaw (CVSS 2.2) affecting mainwp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The MainWP Dashboard – WordPress Manager for Multiple Websites Maintenance plugin for WordPress is vulnerable to CSS Injection via the ‘newColor’ parameter in all versions up to, and including, 4.5.1.2 due to insufficient input sanitization. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary CSS values into the site tags.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	2.2 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	High
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-74, CWE-79
Published	2023-11-22
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: mainwp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-11-22 16:15 UTCPublished CVE record published
2026-06-17 06:50 UTCUpdated Record last modified

mainwp mainwp UPGRADE

Affected: <= 4.5.1.2

Fixed in: newer than 4.5.1.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mainwp || rpm -q mainwp || mainwp --version

2. UPGRADE to newer than 4.5.1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mainwp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mainwp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-6164?

mainwp: upgrade to newer than 4.5.1.2. Exact commands for each OS are on this page.

Is CVE-2023-6164 being exploited?

CVE-2023-6164 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-6164 affect?

CVE-2023-6164 affects mainwp. Severity is low (CVSS 2.2). The MainWP Dashboard – WordPress Manager for Multiple Websites Maintenance plugin for WordPress is vulnerable to CSS Injection via the ‘newColor’ parameter in all versions up to, and including, 4.5.1.2 due to insufficient input sanitizatio

How urgent is CVE-2023-6164?

Priority 16/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities

References

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